Why must scientists use standard units of measure in their experiments

This is so that all measurements can be used without having to calculate from different units.

If the water vapor content stays the same and the temperature drops, then the relative humidity increases. its vise versa.if the water vapor content stats the same and the temperature rises, the relative humidity decreases. so, yes, i'd say that temperature and humidity have a strong relationship.

Talc (french chalk) is the ingredient